package CollectionsDay02;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Random;

public class SortListDemo {
    public static void main(String[] args) {
        Random rand = new Random();
        List<Integer> list = new ArrayList<Integer>();
        for (int i = 0;i<10;i++){
            list.add(rand.nextInt(100));
        }
        System.out.println("list原始数据:"+list);

        Collections.sort(list);//自然排序
        System.out.println("list排序后数据:"+list);

        Collections.reverse(list);//反转排序(本质上数据已经发生变化了)
        System.out.println("反转后"+list);
    }
}
